[PYTHON] Ich würde gerne etwas über Django Page Nation erfahren

Ich habe mit einem Nachschlagewerk namens Python Django studiert Ich stolpere über "Wie verschiebe ich Seiten?" In 4-3 Page Nation. zuerst funktioniert gut, aber prev, next und last werden unweigerlich nicht gefunden. Kannst du mir sagen wer du bist? Die Quelle sieht so aus Es ist mein erster Beitrag, daher denke ich nicht, dass er gut verwendet werden kann. Es tut mir Leid django_app/hello/url.py from django.urls import path from . import views

urlpatterns=[ path('',views.index,name='index'), path('int:num',views.index,name='index'), path('create',views.create,name='create'), path('edit/int:num',views.edit,name='edit'), path('delete/int:num',views.delete,name='delete'), path('find',views.find,name='find'), path('check',views.check,name='check'), ]

django_app/hello/views.py from django.shortcuts import render from django.http import HttpResponse from django.shortcuts import redirect from .models import Friend from .forms import FriendForm from .forms import FindForm from django.db.models import Q from django.db.models import Count,Sum,Avg,Min,Max from .forms import CheckForm from django.core.paginator import Paginator

def index(request,num=1): data = Friend.objects.all() page = Paginator(data,3) params = { 'title': 'Hello', 'message':'', 'data': page.get_page(num), } return render(request,'hello/index.html',params)

create model def create(request): if (request.method == 'POST'): obj = Friend() friend = FriendForm(request.POST,instance=obj) friend.save() return redirect(to='/hello') params = { 'title' : 'Hello', 'form' : FriendForm(), } return render(request,'hello/create.html',params) def edit(request,num): obj = Friend.objects.get(id=num) if (request.method == 'POST'): friend = FriendForm(request.POST,instance=obj) friend.save() return redirect(to='/hello') params={ 'title' : 'Hello', 'id' : num, 'form' : FriendForm(instance=obj), } return render(request,'hello/edit.html',params) def delete(request,num): friend = Friend.objects.get(id=num) if (request.method == 'POST'): friend.delete() return redirect(to='/hello') params = { 'title' : 'Hello', 'id' : num, 'obj' : friend, } return render(request,'hello/delete.html',params)

def find(request): if (request.method == 'POST'): msg = request.POST['find'] form = FindForm(request.POST) sql = 'select * from hello_friend' if (msg != ''): sql += ' where ' + msg data = Friend.objects.raw(sql) msg = sql else: msg = 'search words...' form = FindForm() data =Friend.objects.all() params = { 'title' : 'Hello', 'message' : msg, 'form' :form, 'data' :data, } return render(request,'hello/find.html',params) def check(request): params={ 'title' : 'Hello', 'message' : 'check validation.', 'form' : CheckForm(), } if (request.method == 'POST'): obj = Friend() form = FriendForm(request.POST,instance=obj) params['form'] = form if (form.is_valid()): params['message'] = 'OK!' else: params['message'] = 'no good.' return render(request,'hello/check.html',params)

django_app/hello/template/hello/index.html {% load static %}

{{title}}

{{message|safe}}